environment: cleanup prototype declarations of env functions.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/api/api.c b/api/api.c
index 1ee7c68..19c7154 100644
--- a/api/api.c
+++ b/api/api.c
@@ -30,6 +30,7 @@
 #include <command.h>
 #include <common.h>
 #include <malloc.h>
+#include <environment.h>
 #include <linux/types.h>
 #include <api_public.h>
 
@@ -40,8 +41,6 @@
 
 /* U-Boot routines needed */
 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
-extern uchar (*env_get_char)(int);
-extern uchar *env_get_addr(int);
 
 /*****************************************************************************
  *